Steam-generator.



H. L. VAN ZILE & F. CHRYSLER. STEAM GENERATOR.

APPLICATION FILED Nov. 21, 1908. 921 ,486, Patented May 11, 1909. z SHEETS-HEBT 1.

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H. L. VAN ZILE n F. CHRYSLER. STEAM GENERATOR. APPLICATION funnov. 21. 1908.

921,486.' Patented May 11, 1909.v

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UNHE FATENT HARRY L. VAN ZILE, OF NEW YORK, AND FRANK CHRYSLER, OF ALBANY, NEW YORK.

STEAM-GENERATOR.

Specication of Letters Patent.

Patented May 11, 1909.

Application tiled November 21, 1908. Serial No. 463,813.

To all whom 'it may concern.'

Be it known that we, HARRY L. VAN ZrLn and FRANK. CHRYSLER, citizens of the United States, residing in the borough of Manhattan, in the county and State of New York, and Albany, in the county of Albany, State of New York, respectively, have invented certain new and useful improvements in Steam- Generators, of which the following is a specication.

This invention relates to steam generators generally, of that type embodying water tubes;v and it consists essentially of a novel arrangement of the water tubes, and means for increasing the capacity of the boiler, as will be hereinafter fully described and briefly stated in the claims.

One of the chief objects of the invention is to provide for a more uniform heat absorption in the various chambers or parts of the boiler, whereby a more uniform velocity in the circulation of the water through the tubes is attained.

Another obiect oi the invention is to provide means by which the capacity and economy of the boiler nay be increased.

Other objects of the invention will become apparent upon a full disclosure thereof.

In the accompanying drawing; Figure 1 is a side elevation, partly in section, of our iinproved boiler, and Fig. 2 is a transverse section of the same.

Referring to the several views, the numeral 1 indicates the furnace, which may be of any approved construction, preferably divided into front and rear combustion chambers, 2 and 3, by a transverse bridge wall 4, each chamber being provided with a suitable grate 5 and an opening 6 for the admission of fuel.

The numeral 7 indicates the boiler chamber, which is divided into chambers S, 9 and 10, in each of which is arranged a bank or group of water tubes 11 in lcommunieation with the water legs 12 and 13, the water legs being, in turn, in communication with one or more water and steam drums 14. rihe division of the several chambers is made by baiile plates 15, 16, and 17, formed of rows of tiling supported upon the upper tiers of the respective banks of tubes, the bafIie plates 15 and 17 extending from the rear Water leg to Within a suitable distance of the front water leg to provide gas passages 1S and 19, respectively, and baille plate 16 eX- tending from the front water leg to within a suitable distance of the rear water leg to provide a gas passage 20. The lower tier of the lower bank of tubes is embedded in or enveloped by rows of tiling to protect the tubes from intense heat, and to provide a roof or ceiling 21 for the combustion chambers. The tiling begins a suitable distance from the front wall of the furnace to provide a gas )assage 22 for the passage of the gases from dhaiuber 2, and ends a suitable distance from the rear wall of the furnace to provide a passage for the passage of the gases from chamber For running the boiler at a steady load for most of the time, we prefer to use the rear, combustion chamber, as the heating surface in chamber 8, containing the lower bank of tubes, is adjusted to the work of said combustion chamber, the gases therefrom passing forward and among` the tubes, while the heating surface in chambers 9 and 10, containing the other banks of tubes, is adjusted to the work of both combustion chambers. When it is desired to have the boiler deliver its maximum power the front combustion chamber may be placed in commission, but it will be evident that the rear combustion chamber may be employed to run the boiler to the exclusion of the front combustion chamber.

In operation, the gases in the rear chamber pass under the roof or ceiling and up through the passage 23, thence forward among the tubes in the lower chamber and up through passage 18, thence rearward through cham ber Q and among the bank of tubes in said chamber thence upward through passage 20, forward through chamber 1l) and among the bank of tubes therein, and thence through passage 19 and back under the drum or drums to the uptake chamber 24. TWhen the front combustion chamber is put into operation, the gases pass under the roof or ceiling up through passage 22 into the lower tube chamber, where they mingle with the gases passing from the rear combustion chamber. During combustion the tiling roof 21 becomes white hot, radiating a high degree of heat in the respective combustion chambers, thus insuring complete combustion of the gases before they come in contact with next bank of tribes, and as the gases from combustion chamber 3 travel four times the length of the boiler, it will be obvious that a maximum amount of heat will be imparted to the water, so that the water will be caused to circulate 'through the tubes with a more uniform velocity than in the ordinary tube boilers, the rapidity of circulation beingdependent upon the amount of heat absorbed by the tubes.

By protecting the lower tier of tubes, of the lower bank, from the intense heat of the combusting gases, an important advantage is attained, as the hot gases are permitted to transfer the work to the remaining banks of tubes, and thereby obtain a more uniform heat absorption in all parts of the boiler.

It wiil be noted that the water tube space is practically divided into three chambers, with a bank of tubes arranged in each chamber, and communication between the chambers established at alternate ends, which arrangement insures intimate contact of the hot gases with the entire tube surface.V T he arrangement of the two combustion chambers also forms an importantfeature of our invention, as increased capacity and economy is obtained by their oint use, and communication between the tube chambers is so arranged that the lower bank of tubes will be proportioned to the heat furnished from the rear combustion chamber, and the remaining banks proportioned to the heat from both combustion chambers.

Claims.

1. Ina steam-generator, the combination with a plurality of banks or groups of watertubes, arranged one above the other and separated from each other by baille-plates, and passage-ways alternately arranged in lsaid baffle-plates, of a furnace chamber divided into two separate combustion-chambers, and a roof or ceiling, for each combustion-chamber, provided at its outer or forward end 'with a gasepassage, whereby one of said combustion-chambers may be run independently ofthe Other- 2. In a steam-generator, the combination with a plurality of banks or groups of watertubes, arranged one above the other and separated by baiile-plates, and passage-ways alternately arranged in said bathe-plates, of two independent combustion-chambers, and a protecting covering for the bottom tier of tubes of the lower bank or group, said covering forming a ceiling or roof for each combustion-chamber, and gas-passages arranged in the covering in such a manner that both combustion-chambers may be operated together, or independently of each other.

3. In a steam generator, the combination with water tubes arranged in banks or groups, one above the other, separated from each other by bame plates having passage ways arranged at alternate ends, a water and steam drum, water legs in communication with said drum and the several banks of tubes, of a furnace chamber divided by a Y bridge wall into two independent combustion chambers, and a roof or ceiling for both chambers supported at the bottom tier of tubes of the lower bank said roof beine' ro-V bridge wfall into two independent combustion chambers, and means for protecting a portion of the tubes in the lower bank from too intense radiation of heat and a gas passageV for each combustion chamber, wherethr ugh the gases of combustion may pass among the banks of tubes.

5. In steam generator, the combination with water tubes separated from each other by baffle plates and passage-ways alternately arranged in said baffle plates, of a furnace chamber divided into two separate compartments and a roof or ceiling for each combustion chamber, provided at its outer or forward end with a gas-passage, whereby one of said combustion-chambers may be run independently of the other.

In testimony whereof we affix our signatures in the presence of witnesses.

HARRY L. VAN ZILE. FRANK CHRYSLER.

Witnesses for Van Zile:

IN. M. BAsTABLE, F. L. HUMMEL. Iitnesses for Chrysler:

EDWARD CANTWELL, ABRAM M. MULL. 

